package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import static java.lang.System.currentTimeMillis;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("ppt.pptx");
        FileOutputStream fos = new FileOutputStream("ppt_cp2.pptx");
        int len = 0;
        long start = System.currentTimeMillis();
        byte[] data = new byte[1024 * 10];
        while ((len = fis.read(data)) != -1) {
            fos.write(data, 0, len);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕!耗时:" + (end - start) + "ms");
        fis.close();
        fos.close();
    }
}
